I'm gonna guess that they aren't completely dry. When you say your next step is to dump the can and then "leave them in the sun all day" I'm assuming they weren't allowed to dry long enough the first time. Add in even more time if you tumbled them before de-priming. Water will take much longer to evaporate out of the seated primer. I usually de-prime before wet tumbling.

Whenever I wet tumble I leave the brass out or in an unsealed container for at least a couple days. Usually does the trick with even 223 cases.

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Stop calling them Lawmakers. It only encourages them.

I wet tumble.
I blow off the cases with air.
Then let sit in the sunlight on a dry towel for at least 1 hour if not 2 hours.
Winter time I have to bring in the house to dry overnight. .

I store in 2 gallon buckets. And I use a 8 gallon plastic trash bag .
A bag of dissicant and zip tie the bag closed.
The 2 gallon buckets don't have a seal. That's why I use the trash bags.
I have around 20 buckets of brass stored this way.

It is always interesting to see how other people go about the process of drying brass, but I'm sometimes confused about the logic involved.

1. If you're not going to deprime before washing...I'd don't deprime handgun cases...you have to allow additional drying time as you don't have the assistance of airflow through the flash hole.

2. When the ambient temperature gets into the 90s, I lay my brass in a turkey pan out in the sun... single layer works best...it is important that all the cases be in direct sunlight. I usually leave them out 3-4 hours.

3. If drying in the oven, I set the oven to Convection Bake and the temperature to 215...the boiling temperature of water is 212...and leave them in 20-30 minutes.

I use the dehydrator method as well. It works amazing. I bought mine from Harbor Freight a few years back. When I finish tumbling, I take the brass and put it in the middle of a huge beach towel. I pick the towel up and shake it/agitate the brass as much as possible to get the water out. I bet this gets 85%+ of the water out. The dehydrator does the rest!

After depriming, ss washing, separating the pins, then I pour the brass into a 5 gallon bucket.

The bucket has lots of drilled holes on the bottom. I shake the brass around and the water drips out. If need be, I use the bucket to extra rinse the brass, or use the bucket to wash the brass after range pickup.

After the bucket, then I use a brass dryer from Frankfort Arsenal. This dryer has temperature settings.

I did drop the dryer and broke the temp setting, so I used my wife’s hair dryer.

That hair dryer dries faster than an oven and the brass will burn you.

Not really interested in baking for hours and the $$ in gas for the oven and maybe the contaminates.

You're worried about contaminants on brass in the oven? You cook food in it, don't you? Do you worry about contaminants there?

Personally, I use an electric food dehydrator (about $90 on E-Bay); an hour at 70C dries decapped brass quite well (a half hour does it, but an hour is a lot easier to set on mine.)

For non-decapped brass, I would suspect it would take a *lot* longer, as the water vapor would have to migrate out through the flash hole; not a lot of air transfer through the tiny hole, so getting water out will be really slow. And the residual ash will tend to hold liquid which exacerbates the problem.

I pour the wet brass onto a towel and use the hammock method to “tumble dry”. I then spread them onto a fresh towel and just let them air dry. I got a cheap box fan from Walmart and sometimes set that up. I typically let it sit for a few days. I work a lot and don’t typically tumble brass and reload on the same day so I can deal with letting them sit out for a while.